1) This keyboard is made by high-quality silicon and suitable for different environments and good practicality, durability, comfort and flexibility 2) It is dust-proof and water-proof which can be used after washing and cleaning 3) It is compact with ultra-slim design, foldable and convenient to carry which is suitable for travel, school or other working environment 4) Smooth surface and elastic silicon material can reduce scratches of sharp objects 5) Silent and flat design is easy for typing, and the keyboard can be packed in small hangbag, knapsack or laptop bag 6) Ergonomic design makes the tactile impression soft, natural and comfortable 7) It can be used in kinds of different environments 8) Operating distance: 8 - 10m 9) Multi-languages support: YES 10) Protocol: bluetooth 3.0 / 2.0 / 1.2 / 1.1 11) Size: 25x8.5cm 12) Power: 2 x AAA battery (include)